Bandit trap for revolving doors



March 17,1925. 1,529,686 L. F. BOHRER BANDIT TRAP FOR REVOLVING DOORSFiled Feb. 4, 1.924 2 Sheets-Sheet 1 March 17, 1925. v 1,529,686

L. F. BOHRER BANDIT TRAP FOR REVOLVING DOORS Filed Feb, 192.4 2Sheets-Sheet 2 Patented Mar. 17, 1925.

UNITED STATES LOUIS F. BOHRER, on NORMAL, ILLINOIS.

'IBANDIT-TRAP FOR REVOLVING- DOORS.

Application filed February 4, 1924.

To all whom it may concern:

Be it known that I, LOUIS F. BQHRER, a citizen of the United States ofAmerica, and resident of Normal, in the county of McLean and State ofIllinois, have invented certain new and useful Improvements in Bandit'lraps for Revolving Doors, of which the following is a specification.

This invention relates to building struc-- tures, and particularly toinventions known as burglar traps, in which provision is made forpreventing the escape of burglars who attempt to rob bankinginstitutions or the like.

It is an object of this invention to provide means associated with theordinary door of the ingress and egress of a counting room or bankingroom whereby at the will of the occupants of the buildingor room, thedoor may be rendered inoperative and held rigid and immovable so thatthe burglar cannot escape.

It is a further object of this invention to produce mechanism associatedwith a re volving door guarding such banking room whereby means forholding the door may be made operative by the manipulation of trip pingmechanism or the like, stationed at a distance from the door as, forinstance, by the oflicers of the institution stationed back of thecounters or windows so that if a burglar attempts to hold up theattendants, the door locking mechanism may be released to effect thesecuring of the door in order that the bandit may not escape.

It is a further object of this invention to produce a rotary doorlocking mechanism which can be installed in association with revolvingdoors now in common use, or which may be employed in connection with newrevolving door installations.

It is a further object of this invention to produce a door retainingdevice, the mechanism of which is concealed and so located as to beinaccessible to those who might want to tamper with the mechanism torender it inoperative.

lVith the foregoing and other objects in view, the invention consists inthe details of construction, and in the arrangement and combination ofparts to be hereinafter more fully set forth and claimed.

In describing the invention in detail, reference will be had to theaccompanying drawings forming part of this application wherein likecharacters denote correspond Serial No. 690,553.

ing parts in the several views, and in which g Figure 1 illustrates aview in elevation of a door and the locking mechanism partly insection,- x

Figure 2 illustrates an enlarged detail view of the upper part of thestructure shown in Fig. 1; W p

Figure 3 illustrates a top plan view of the door lockingmeohanism; p Y

Figure & illustrates a sectional view on the line 4- 1 of Fig. 1; and aFigure 5 illustrates a View" in elevation of trip operating mechanism. vi i In these drawings, 10 denotes a revolv ing door of any conventionaltype in which the spaces between the wings of the door at their upperends are provided with guards 11 in order torender the structurethereabove invisible from" the doorway so that persons passing throughthe doorway will not observe the door locking mechanlsm, or gain accessto it for the purpose of tampering with it to render it inoperative.

In the present embodiment of the invention, an apertured plate 12 issupported above the door, the apertures 13 of which are intended toreceive bolts or rods 14 which are slidable in the apertures, and theplate 12 acts as a guide and a retaining device for the bolts when theyare in position to engage the sides of the wings of the door above theshield 11.

The structure above the plate 12 may be provided to suit therequirements, but if there is a floor such as 15 above the plate, it canbe provided with apertures such as 16, through which the bolts willreciprocate as they move up and down, as will presently appear.

The bolts have their upper ends anchored to a head 17, and in thepresent embodiment of the invention, the head is apertured to receivethreaded portions of the bolts, and nuts 18 and 19 are threaded on thebolts above and below the head, respectively whereby thebolts aresecured to the head so that as the head is moved up and down, the boltswill rise or fall and when they descend they are intended to pass belowthe upper edges of the wings of the door and retain the wings againstmovement.

As a means for operating the head, the central post 20 thereof has alink 21 pivotally connected to it, and the upper end of the link ispivoted to a lever 22 that is fulit,-leading to difierent pedals 29shown here crumed .on a bracket 23 floor 15'." The lever extendsradially of the head and operates in a guide 2 L that is stationed atone edge of the head, A .detent or dog 25 has one end pivoted in theguide and the opposite end BXtBIlClSriIltO' engage-;

ment with the lever 22 to holdit depressed at the outer end; a conditionwhich results in ,suspendingthe, head and the bolts 1n order that thebolts will'be free of the up: per edges of the wings of the door duringthe normal operation of the door.

A flexibleelement 26 such as a cable may 'beconnected to the lower endof the detent and it'maymo-perate over'suitable pulley-s or guides-27 todistantpoints ,where branch cables or elements 28 may be connected tostations in order that different, operators may release l the doorlocking mechanism, should occasion require,

by pressing on pedals 29, one of which is secured to each of the branchcables-28: The are of vconventional type although any appropriate pedals-or trip actuating 1 devices may theselocations. A V

Fronian inspection of the drawing and from-"the foregoing descr ption,it will be supported on the be employed inv the apertures of or thewings'of the door from moving sov that the door eannotabe revolved'.When thi'soccurs, the doors will be held-to prevent the escape of thebandits andvthedevice wilLtherefore act as a trap.

I claim:

1. Ina bandititrap, a door section pivoted on a vertical axis and havingwings inspaced relation to' each other, shields between the wings neartheir upper ends, an

apertured plate covering the-area occupied by the door when in normal-"position, a

guiding element thereabove having aper-= tui-es V alinin-g with theapertures of the plate,

' a head superimposed above theguidin g-ele ment and havlng downwardlyprojecting bolts guided in the apertures ofthe-guiding element and thesaidpl'ate means i for 11o1dingthe head suspended, and means-tortripping the pended,- i substantially asdescribed- In a bandit trap, ai-door section pivoted on a vertical-axis, anapertured plate position:to guard a passage, a gui-ding ele mentabove the apertured'plate in-spa'ced relation thereto' having I apertures alining with theaperturesofthe-platega head super-:

means for holding the head sus--- above the area occupied by the doorwhen in imposedabove the guiding eleinent and hav V downwardlyprojectingbolts guided in :the guiding -element 7 and the said plate andadapted to project into: 1

" the path of; travel-o-f the (ilOOPSGOtiOIl, means for holdi'n'gthehead suspended, and means for trippingthe means for holding the .headsuspended, substantiallyas described 1 LOUIS F. BOH'RERJ:

